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  • Design, fabrication and testing of an improved high heat flux element, experience feedback on steady state plasma facing components in Tore Supra

Abstract

Actively cooled plasma facing components (PFC) have been developed and used in Tore Supra since 1985. One of the main technological problem is due to the expansion mismatch between graphite armour and metallic heat sink materials. A first technology used graphite tiles with or without a reinforcement and with a compliant layer, brazed with Titanium-Copper-Silver (TiCuSil) alloy. The next technology used CFC (Carbon Fibre Material) tiles with a 2 mm pure copper compliant layer, since the good mechanical strength of the CFC allowed the reinforcement layer to be suppressed. Non destructive inspection during the manufacturing procedure was found to be essential to insure a good reliability of the elements. A recent technology was developed for the new actively cooled toroidal pump limiter of Tore Supra (designed to remove up to 15 MW during 1000s with incident heat flux up to 10 MW/m{2}. This new technology uses an active metal casting (AMC) of copper onto CFC tiles whose surface is prepared by a laser treatment. Copper compliant layer is then electron-beam welded to the heat sink. This technology is silver free and could be ITER relevant. The first bonding is X-ray controlled and the second one ultrasonic (US) tested. Finally all the elements are controlled by infrared imaging technique during a hot water test.

Additional information

Authors: SCHLOSSER J ET AL, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);PLÖCHL L, Plansee AG, Reute (AT)
Bibliographic Reference: Article: Fusion Engineering and Design (1997)
Record Number: 199710984 / Last updated on: 1997-08-14
Category: PUBLICATION
Original language: en
Available languages: en
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